Portable developing-cabinet.



R. H. BROWN.

PORTABLE DEVELOPING CABINET. uflmrrrdfi iii-En mm. 21, 1901.

903,052. Patented Nov. 3, 1908.

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R. H. BROWN.

PORTABLE DEVELOHNG CABINET.

APPLIGATION FILED DBO. 21, 1907.

903,052. Patented Nov. 3, 1908.

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RICHMOND H. BROWN, OF LAWRENCE, MASSACHUSETTS.

PORTABLE DEVELOPING-CABINET.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application filed December 21, 1907. Serial No. 407,505.

To all whom it may concern:

Be it known that I, RICHMOND H. BROWN, a citizen of the United States, residing at Lawrence, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Portable Developing-Cabinets, of which the following is a specification.

My invention relates to improvements in ortable dark rooms or developing cabinets or photographic work and is especially adaptable for developing and fixing sensitive plates, films, or paper, and for loading holders.

The object of my invention is to provide a cabinet which is of such shape and size as to allow of loading holders, to receive the various trays of developing and fixing solutions and to receive a number of plates, films or papers and, at the same time, is small enough to be conveniently carried around, and is so arranged that every part of it will be readily accessible to the operator.

In the accompanying drawing, Figure 1 is a front perspective view with the cover down. Fig. 2 is a front perspective view with the cover raised. Fig. 3 is a front view with the slide removed. Fig. 4 is a detail of a modified form of bearing. Fig 5 is a sectional side view. Fig. 6 is a detail of the light shade and ends connection. Fig. 7 is a sectional top view. Figs. 8 and 9 are details of the su plementary glass frame and Fig. 10 is a detai section of the glass frames.

My cabinet consists of a box A which is of a length to receive, side by side, the different trays and films or plates used in developing. It is preferably made of wood in such manner as not to warp or crack. It may however be made of sheet metal or other suitable material. Its width, from front to back, is comparatively small and its depth is comaratively small. It is open at the top and is provided with a hinged cover B. The front is substantially open, see Fig. 3, and is provided at the top and bottom with stri s 11, 12, in which are suitable grooves or ra bets, 13, 13. In these grooves 13, 13, an arm slide C, which is considerably longer than the cabinet, slides freely. In this arm slide 0 are arm holes D around which are attached sleeves 31. I

In the cover and back of the cabinet are windows G and II of nonactinic lass which rovide light for and a view of t e interior. he developing materials, plates, and other articles, are placed inside the box A and the cover is closed. The arms of the operator are then inserted through the sleeves 31 and arm holes D so that his hands are inside. By reason of the length and longitudinal sliding action of arm slide C, he is enabled to reach freely from one end of the cabinet to the other and to all parts thereof for developing the plates or handling the different articles therein.

All fiat parts of the cabinet are preferably rabbeted to fit each other, and, as an additional precaution to kee out the white sunlight, a quarter roun strip 14 may be broken around the various oints.

The cover B is hinged at the back and is provided with preferably two windows G in which are panes 40 of nonactinic glass, as for instance, ruby glass, leaving considerable space at the right without glass. These are for the operator to look through at his work while they exclude the sunlight which injures the light sensitive surface. The cover B is rabbeted on the outside around the window openings to receive the ruby panes 40, and these are held in place by means of quarter round moldings 41 tacked around the ed es.

it the back of the cabinet, I place two more windows H, with ruby panes 50 in a corresponding position and manner to those on the cover. A dark space is thus left on the right of the cabinet where the holders or other light-tight receptacles which may be opened and manipulated by the sense of touch alone by any one versed in the art may be placed. These windows at the back are mainly to light the work.

As it is sometimes desirable to change the color of the working light, as by interposin an orange glass, I provide on the inside 0 each of the windows spoken of, a rabbeted frame 60, such as shown in Fig. 8, in which the rabbet 61 at the top is deeper than the one at the bottom 62. Three sides of this frame are fixed around each window and the fourth 63 is rabbeted at each end to enter the top and bottom rabbets 61 and 62 and israbbeted along its inner edge 64 to allow it to pass over the adjoining edge of the orange glass. To insert the orange glass pane 66, the detachable end 63 is removed, the glass 66 is pushed up into the deep rabbet 61 at the top, and is then pushed in and dropped into the shallower bottom rabbet 62. The detachable end 63 is then pushed into place over the lass 66 which is thus held firmly in place wit all its edges covered. The orange glass pane is removed in the reverse way.

In order to make a light-ti ht oint for the arm slide 0, I rabbet it at tie top and bottom at 70 on the outside. and rabbet the top and bottom front box strips 11 and 12 on the inside at 13. I then tack strengthening strips 71, 71 on the inside of each front box strip 11 and 12 so as to lap over the inside of the arm slide, thereby overcoming any tendency of arm slide C to spring in at the middle portion and admit light.

To make a smooth and light-tight hearing at each end of the box for the arm slide I attach vertical bearing strips 72, 72, in which are vertical grooves 73, 73 which I fill with soft yielding material such as plush or velvet, 74. These plush or velvet strips exclude the light and at the same time make a soft and yielding bearing.

A better construction is shown in Fig. 4-, wherein the grooves 73 are somewhat wider and the plush or velvet 74 is glued along each vertical edge in said groove. In each groove 73, is a deeper groove 75 in which I place a strip 76 of wood or metal and behind this strip one or more s rings 77. Springs 77 push out strip 76 an so plush 74, making at all times a tight elastic joint.

Preferably, in attaching the sleeves to the arm slide, I cut a rectangular annular groove 78 outside the edge of each arm hole. Over this, I spread the inner end of a sleeve 31. Over the cloth of the sleeve I then place an annular wooden s line 79 which I drive into place in the annul ar groove 78, thus holding each sleeve firmly in lace and reventing any possible access of light. Eac 1 sleeve is preferably provided with an elastic 32 at its outer end to hug the sleeve of the operator.

To revent anyreflection of direct light or light om any bright articles from the outside on the top windows'from interfering with the view of the interior by the operator, I arrange a light shade which consists of a board E hinged near the back of the cover. This board, when down, serves to protect the top windows G from breakage in acking or in transporting the cabinet. To old it in the operative raised osition shown in Fig. 1, I provide detachab e ends 80, 81, each of which is of the shape of an acute angle, the ends of which are joined by a curve as shown. Projecting inward from each straight side of each end is a metal tongue 82 adapted to enter a corresponding groove 83, one in board E and one in cover B. Each of these grooves is partly covered by a plate 84. It Will be seen that the ends 80, 81 can thus be ushed sidewise into lace and will then old the light shield E in place. Th y will prevent board E from falling backward when cover B is raised and they can be readily removed by pressing outward when it is desired to drop the light shade. I prefer to provide a pivoted. arm 67 to hold the cover in a raised position. It will be seen that for packing or transporting or to obtain access to the interior for cleaning or otherwise, the arm slide with its sleeves can be slid entirely out of its grooves and thus se )arated from the box.

What I claim as my invention and desire to cover by Letters Patent, is:

1. A portable developing cabinet comprising a rectangular box with solid ends and bottom, a back provided with nonactinic windows, a top provided with nonactinic windows, and a front which is partly open lengthwise to receive an arm slide, and said arm slide which is provided with arm holes and is of greater length than the box.

2. In a portable developing cabinet, a rectangular box in which are windows of nonactinic glass, and a front comprising upper and lower grooved stri )s, combined with an arm slide which slidably fits said. grooved strips and is longer than the box, arm holes therein, and arm sleeves attached around said arm holes.

3. In a portable developing cabinet, a rec tangular box in which are windows of nonactinic glass, and a front comprising upper and lower grooved strips, vertical end strips in which are grooves, yielding material carried by said grooves, combined with an arm slide which longitudinally and slidably fits said upper and lower grooved strips and is longer than the box, arm holes therein, and arm sleeves attached around said arm holes.

4. In a portable developing cabinet, a rectangular box in which are windows of nonactinic glass, combined with a front comprising upper and lower groovedstri s, an arm slide which longitudinally and s idably fits said grooved strips and is longer than the box, arm holes therein, a rectangular annular groove around each of said arm holes, a sleeve which enters said groove, and an annular spline which enters said groove.

5. In a portable developing cabinet, a rectangular box in which are windows of nonactinic glass, combined with a front comprisin upper and lower grooved strips, an arm sIide, arm holes therein, sleeves around said arm holes, vertical end strips in which are grooves, yielding material attached in said rooves, stri s behind said yielding materia located in eeper rooves, and springs behind said strips in said deeper grooves.

6. In a portable developmg cabinet, a rectangular box in which are windows of nonactinic glass, rabbeted strips attached around the inside of each of said windows on three sides, a removable rabbeted strip on the fourth side, a ne nenactinic lass fitted in the rabbets inside of each winow, a front comprising up er and lower grooved strips, combined witl i an arm slide,

arm holes therein, sleeves around said arm holes, vertical grooved bearing strips, yielding material carried by the grooves therein, strips under said yielding material, and springs under said strips.

7. In a portable developing cabinet, a rectangular box in which are windows of nonactinic glass, rabbeted strips fixed around the inside of each of said windows on three sides one of the fixed strips being rabbeted deeper than the others, a removable rabheted strip on the fourth side, a pane of nonar-tinic glass fitted in said rabbets, a front comprising upper and lower grooved stri )5, combined with an arm slide, arm holes therein, sleeves around said arm holes, vertieal grooved bearing strips, yielding ma terial carried by the grooves therein, strips under said yielding material, and springs under said strips.

8. In a portable developing cabinet, a rectangular box in which are windows of nonactinic glass, combined with rabbeted strips around each of said windows, a pane of nonactinic glass for each window detaehably carried by said rabbeted strips, a front comprisiin upper and. lower grom ed strips, an arm side which slidably iits said grooved strips, arm holes therein, sleeves around said arm holes, vertical grooved bearing strips, yielding material carried by said grooves, strips under said yielding material, and springs under said strips, a light shield on the box cover, and end pieces For said light shield.

9. In a portable developing cabinet, a rectangular box in which are windows ol' nonactinic glass, combined with rabheted strips attached around each of said windows, a pane of nonactinie glass for each window detachably carried by said strips, a front comprising upper and lower grooved strips,

an arm slide which slidabl r its said grooved strips, arm holes therein, sleeves around said arm holes, vertical grooved bearing strips, yielding material carried by the grooves therein, strips under said yielding material, and springs under said strips, a light shield on the box cover, end pieces for said light shield, grooves in said light shield and cover, plates which partly cover said grooves, tongues which project from said end pieces and pass into said grooves under said plates.

10. In a portable developing cabinet, a plurality of windows of nonactinic glass, rabbeted strips fixed around said windows on the inside on three sides the rabbet in the top strip being deeper than in the bottom, a detachable rabbeted strip on the fourth side, and a detachable pane of nonactinic glass fitted in the rabbets of said strips.

11. A hearing for an arm slide in a portable developing eabinet comprising vertical strips in which are one or more grooves, yielding material attached on each side in said grooves, a deeper groove extended from said grooves, a strip in said deeper groove, and a spring behind said strip in said deeper groove.

12. In a portable developing cabinet, a light shade hinged to the cover thereof, detachable ends adapted to support said light shade, grooves in said light shade and in said cover each partially covered by a plate, said plates and tongues lixed to said end pieces each ada ited to lit into one ol' said grooves under said plate.

In testimony whereof I allix my signature in presence of two witnesses.

RICHMOND ll. BROWN.

itnesses:

ORRIN ANnnEws, I'IELEN V. FLEMING. 

